Finding the Fourth Proportional to 139,834.96, 209,781.72 and 45,072.24

Step by Step Solution

1. Step 1: Write the proportion equation
   139,834.96 : 209,781.72 = 45,072.24 : x
2. Step 2: Convert to fraction form
   139,834.96/209,781.72 = 45,072.24/x
3. Step 3: Cross multiply
   139,834.96x = 209,781.72 × 45,072.24
4. Step 4: Simplify right side
   139,834.96x = 9,455,332,031.45
5. Step 5: Solve for x
   x = 9,455,332,031.45/139,834.96
6. Step 6: Final answer
   x = 67,617.80